A Study on the Multi-Domain Environment and Revolution in Military Affairs of the Korean Military

Jaseong Baek,Jiwon Yun J-INSTITUTE 2022 International Journal of Terrorism & National Secu Vol.7 No.1

Purpose: The purpose of this paper is to analyze the impact of the technology of the fourth industrial revolution on the changes in the operational environment, and present the operational employment concept and military buildup related directions of the Korean armed forces in accordance with the changed operational environment in terms of revolution in military affairs. Method: The existing studies of domestic and foreign academics on combat domain, fourth industrial revolution, revolution in military affairs, and joint operations, etc., and the literature focused on research papers published by the Joint Chiefs of Staff and the Army were explored. Based on which, the historical evolution process of technology and domain was examined, and after deriving the evolutionary direction of the field that the fourth industrial revolution will bring, an exploratory approach was attempted to present the joint operational concept and military buildup related direction in line with the characteristics of the new domain. Results: The impact of the fourth industrial revolution across all sectors of society is reflected in the military field as well, fundamentally changing the concept of weapon systems and military operations. The advancement of military science and technology is creating a multi-domain environment by expanding the cross domain. In such a multi-domain environment, joint operations ought to include not only the integrated operation of traditional military types, but also the integrated operation of the domain at the same time. Furthermore, it was confirmed that in order to secure cross domain capabilities appropriate for the multi-domain environment, it is necessary to review the basic concept of joint operation, develop a new paradigm for the appropriate allocation of capabilities, and set a variable point of equilibrium for efficient operation of capabilities. Conclusion: Revolution in military affairs is a process which dramatically amplifies combat effects by developing a new power system by applying the new military science and technologies, and innovatively developing and harmoniously operating joint operational concept and the organizational structures related thereto. Hence, approaching the multi-domain operation (MDO) of the US Army in terms of revolution in military affairs rather than operational aspects will offer useful implications for the Korean armed forces.

New Oral Anticoagulants May Be Particularly Useful for Asian Stroke Patients

방오영,홍근식,허지회,Jaseong Koo,권순억,유경호,배희준,이병철,윤병우,김종성 대한뇌졸중학회 2014 Journal of stroke Vol.16 No.2

Atrial fibrillation (AF) is an emerging epidemic in both high-income and low-income countries, mainly because of global population aging. Stroke is a major complication of AF, and AF-related ischemic stroke is more disabling and more fatal than other types of ischemic stroke. However, because of concerns about bleeding complications, particularly intracranial hemorrhage, and the limitations of a narrow therapeutic window, warfarin is underused. Four large phase III randomized controlled trials in patients with non-valvular AF (RE-LY, ROCKET-AF, ARISTOTLE, and ENGAGE-AF-TIMI 48) demonstrated that new oral anticoagulants (NOACs) are superior or non-inferior to warfarin as regards their efficacy in preventing ischemic stroke and systemic embolism, and superior to warfarin in terms of intracranial hemorrhage. Among AF patients receiving warfarin, Asians compared to non-Asians are at higher risk of stroke or systemic embolism and are also more prone to develop major bleeding complications, including intracranial hemorrhage. The extra benefit offered by NOACs over warfarin appears to be greater in Asians than in non-Asians. In addition, Asians are less compliant, partly because of the frequent use of herbal remedies. Therefore, NOACs compared to warfarin may be safer and more useful in Asians than in non-Asians, especially in stroke patients. Although the use of NOACs in AF patients is rapidly increasing, guidelines for the insurance reimbursement of NOACs have not been resolved, partly because of insufficient understanding of the benefit of NOACs and partly because of cost concerns. The cost-effectiveness of NOACs has been well demonstrated in the healthcare settings of developed countries, and its magnitude would vary depending on population characteristics as well as treatment cost. Therefore, academic societies and regulatory authorities should work together to formulate a scientific healthcare policy that will effectively reduce the burden of AF-related stroke in this rapidly aging society.

Apixaban for Secondary Stroke Prevention: Coexistant Cerebral Atherosclerosis May Increase Recurrent Strokes

Jong S. Kim,Jaseong Koo,Dong-Ick Shin,Byung-Su Kim,Jei Kim,Eung-Gyu Kim,Keun-Sik Hong,Hyeju Yi 대한뇌졸중학회 2022 Journal of stroke Vol.24 No.1

Background and Purpose Oral anticoagulants are needed in stroke patients with atrial fibrillation (AF) for the prevention of recurrent stroke. However, the risk of major events or bleeding may be greater in stroke patients than in those without, because the presence of cerebral atherosclerosis or small vessel disease may increase these risks. This study aimed to investigate the outcomes of apixaban-treated stroke patients with AF and assess whether these factors are associated with the outcome. Methods This was a sub-analysis of stroke patients with AF enrolled in a prospective, open-label, multicenter, post-marketing surveillance study in South Korea, who were treated with apixaban and underwent magnetic resonance imaging (MRI) (Clinical trial registration: NCT01885598). Results A total of 651 patients (mean age, 72.5±8.7 years) received apixaban for a mean duration of 82.7±37.4 weeks. Fifty-three bleeding events occurred in 39 patients (6.0%), and 10 (1.5%) experienced major bleeding. Seventeen patients (2.6%) had major events (stroke, n=15, 2.3%; all ischemic), systemic embolism (n=1, 0.2%), and death (n=3, 0.5%). MRI data showed no significant association between white matter ischemic changes and microbleeds, and major events or bleeding. Patients with cerebral atherosclerotic lesions had a higher rate of major events than those without (4.6% [n=10/219] vs. 1.7% [n=7/409], P=0.0357), which partly explains the increased prevalence of major outcomes in this group versus patients without stroke (0.7%, P=0.0002). Conclusions Apixaban is generally safe for patients with ischemic stroke. Increased primary outcomes in stroke patients may in part be attributed to the presence of cerebral atherosclerotic lesions, suggesting that further studies are needed to establish therapeutic strategies in this population.

감염성 심내막염의 신경계 합병증:후향적 분석 100예

김성훈,구자성,윤병우 대한신경과학회 2001 대한신경과학회지 Vol.19 No.3

압축 센싱의 성능 향상을 위한 가변 블록 크기 기술

함우규(Woo-Gyu Ham),구자성(Jaseong Ku),안창범(Chang-Beom Ahn),박호종(Hochong Park) 대한전자공학회 2013 전자공학회논문지 Vol.50 No.4

기존의 블록 기반 압축 센싱은 고정 블록 크기를 사용하여 신호를 복원하며, 영역별 신호의 특성에 적합한 블록 크기를 사용하지 못하여 복원 성능이 저하된다. 본 논문에서는 이 문제를 해결하기 위하여 블록 기반 압축 센싱에서 신호의 특성에 따라 블록 크기를 가변적으로 결정하여 복원 신호의 품질을 향상시키는 가변 블록 크기 기술을 제안한다. 제안한 방법은 여러 블록 크기로 신호를 복원하고, 프레임별로 각 복원한 신호의 자기 상관도를 측정하여 신호의 특성을 확인하고, 프레임의 블록 크기를 결정한다. 동일한 측정 데이터에 대하여 제안한 가변 블록 크기 방법이 기존의 고정 블록 크기 방법에 비하여 향상된 품질의 신호를 복원하는 것을 확인하였다. The conventional block-based compressed sensing uses a fixed block size for signal reconstruction, and the reconstructed signal is degraded because the block size suitable to the signal characteristics is not used. To solve this problem, in this paper, a variable block size method for compressed sensing is proposed that estimates the signal characteristics and selects a proper block size for each frame, thereby improving the quality of the reconstructed signal. The proposed method reconstructs the signal with different block sizes, analyzes the signal characteristics using correlation coefficients for each frame, and select the block size for the frame. It is confirmed that, with the same acquired data, the proposed method reconstructs the signal of higher quality than the conventional fixed block size method.

Cost-Effectiveness of Active Surveillance Compared to Early Surgery of Small Papillary Thyroid Cancer: A Retrospective Study on a Korean Population

Baek Han-Sang,Ha Jeonghoon,Kim Kwangsoon,Bae Jaseong,Kim Jeong Soo,Kim Sungju,Lim Dong-Jun,Kim Chulmin 대한의학회 2023 Journal of Korean medical science Vol.38 No.34

Background: Recently, active surveillance (AS) has been introduced as an alternative to early surgery (ES) for the management of papillary thyroid microcarcinoma (PTMC), because of its indolent features and low mortality. However, its cost effects have not been determined and the findings of current studies differ, according to each country’s medical system. Methods: A Markov model was constructed to compare the cost-effectiveness of AS and ES, based on a reference case of a 40-year-old patient diagnosed with PTMC. Costs and transition probabilities were derived from previous clinical studies in Korean populations, and the incremental cost-effectiveness ratio (ICER) and net monetary benefit (NMB) were calculated. The willingness-to-pay (WTP) threshold was set at USD 100,000 per quality-adjusted life year (QALY) gained. Sensitivity analyses were conducted to address the uncertainties in the model’s variables. Results: From the base scenario, the cumulative costs and effectiveness were both higher in ES than AS. The ICER for ES, compared with AS, was USD 6,619.86/QALY, lower than the set WTP. The NMB difference between AS and ES increased across the stages (USD 5,980 at the first stage and USD 159,667 at the last stage). The ICER increased along with decreasing age and increasing cost of surgery. The higher the ES utility score and the lower that of AS, the more cost-effective ES, with WTP set at USD 30,000. Conclusion: In the current Korean medical system, ES is more cost-effective than AS. ES is more cost-effective as it is diagnosed at young age and followed-up for a long time.

Adaptive Compressed Sensing for the Fast Terahertz Reflection Tomography

Kijun Kim,Dong-Gyu Lee,Woo-Gyu Ham,Jaseong Ku,Sang-Hun Lee,Chang-Beom Ahn,Joo-Hiuk Son,Hochong Park IEEE 2013 IEEE transactions on terahertz science and technol Vol.3 No.4

<P>In this paper, an adaptive compressed sensing is proposed in order to enhance the performance of fast tetrahertz reflection tomography. The proposed method first acquires data at random measurement points in the spatial domain, and estimates the regions in each tomographic image where much degradation is expected. Then, it allocates additional measurement points to those regions, so that more data are acquired adaptively at the regions prone to degradation, thereby improving the quality of the reconstructed tomographic images. The proposed method was applied to the T-ray reflection tomography system, and the image quality enhancement by the proposed method, compared to the conventional method, was verified for the same number of measurement points.</P>

도어 글라스 모터 음질 평가법 개발에 대한 연구

최성욱(Seonguk Choi),이학주(Hark ju Lee),안성철(Sungcheul Ahn),구자성(Jaseong Gu) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5

Various noises occurrence during the vehicle glass up & down tests are difficult to characterize and improve due to not to be quantitative analysis even though the customer complaints are frequent reported on IQS and QIR. In order to solve the problems Head acoustic, ArtemiS used to search the points and improve Sound Quality Evaluation. Design guide lines for improving such problems are proposed at this study.

압축 센싱의 성능 향상을 위한 가변 블록 크기 기술

함우규,구자성,안창범,박호종,Ham, Woo-Gyu,Ku, Jaseong,Ahn, Chang-Beom,Park, Hochong 대한전자공학회 2013 전자공학회논문지 Vol.50 No.6

기존의 블록 기반 압축 센싱은 고정 블록 크기를 사용하여 신호를 복원하며, 영역별 신호의 특성에 적합한 블록 크기를 사용하지 못하여 복원 성능이 저하된다. 본 논문에서는 이 문제를 해결하기 위하여 블록 기반 압축 센싱에서 신호의 특성에 따라 블록 크기를 가변적으로 결정하여 복원 신호의 품질을 향상시키는 가변 블록 크기 기술을 제안한다. 제안한 방법은 여러 블록 크기로 신호를 복원하고, 프레임별로 각 복원한 신호의 자기 상관도를 측정하여 신호의 특성을 확인하고, 프레임의 블록 크기를 결정한다. 동일한 측정 데이터에 대하여 제안한 가변 블록 크기 방법이 기존의 고정 블록 크기 방법에 비하여 향상된 품질의 신호를 복원하는 것을 확인하였다. The conventional block-based compressed sensing uses a fixed block size for signal reconstruction, and the reconstructed signal is degraded because the block size suitable to the signal characteristics is not used. To solve this problem, in this paper, a variable block size method for compressed sensing is proposed that estimates the signal characteristics and selects a proper block size for each frame, thereby improving the quality of the reconstructed signal. The proposed method reconstructs the signal with different block sizes, analyzes the signal characteristics using correlation coefficients for each frame, and select the block size for the frame. It is confirmed that, with the same acquired data, the proposed method reconstructs the signal of higher quality than the conventional fixed block size method.

Autoencoder-based Anomaly Detection

Khoa Anh Ngo(노안콰),Junhan Kim(김준한),Jiseob Kim(김지섭),Jaseong Koo(구자성),Seungjae Baeck(백승재),Byonghyo Shim(심병효) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2

Recently, much research has been devoted to developing deep learning-based anomaly detection techniques. If there is a huge amount of data samples, then deep learning models can be trained to provide an end-to-end solution for anomaly detection. However, in many realistic scenarios, the number of anomalies that can be used for training deep learning models is very limited. In this case, deep learning models trained in the manner of supervised learning performs poor, especially when detecting anomalies in the test phase. In this paper, to overcome this limitation, we put forth an autoencoder-based anomaly detection technique. Through the simulations based on the dataset provided by Samsung display, we show that the proposed technique can detect anomalies well.